Stud driving chuck



April 26, 1960 D. TANN El' AL STUD DRIVING CHUCK Filed June l0, 1957 J'aZyr d 6745s.

Cleary/2@ fr air/urns'.

2,933,960 STUD DRIVING 'CHUCK David Tann, Detroit, and John S. Glass, Ypsiianti, Mich.,

asslgnors to Studrive, Inc., Detroit, Mich., a corporation of Michigan Application June 16, 1957, Serial N '664,636 8 Claims. (Cl. 81-53) This invention relates to a stud driving chuck and has for its object the provision in such a chuck of means to insure withdrawal of the chuck from the stud which will remain in its driven position.

Another object of the invention is the provision of a stud driving chuck having means to lock the stud and chuck in positive driving relation and torelease said positive connection at the beginning of withdrawal rotation of the chuck to facilitate withdrawal of the chuck from Y the stud.

Another object of the invention is the provision of a stud driving chuck having the stud receiving portion movabie relative to the main body of the chuck upon driving rotation of the chuck to lock the chuck and stud in positive relation and in which said portion moves relative to the main body portion of the chuck upon withdrawal ro' tation of said chuck to release said positive connection Patented Apr. 26,1969

2 as provided with a hub 19 2 1 therein into which the stud 17 is to be driven. The piece 18 is formed ofpa material softer than the stud 17 as, for example, die cast metal or plastic, so that "the stud 17 will cut its own threads within the opening 2l.

The threads at 5 between the member 6 and the wall of recess 4 are, as illustrated, of greater diameter and considerably coarser than the threads on the stud L17 so that the member 6 is more easily rotated relative to the body portion 1 of the chuck than is the member 6 rotated relative to the stud 17. i

Fig. 2 not only shows the relation of the parts 1, 6, and

14 after initial separation movement of the chuck but also parts before the stud 17 -is pickedy number of threads are engaged to oier a greater re" sistance than exists at the threads 5, whereupon the body portion 1 of the chuck rotates relative to the member 6 to etect longitudinal movement of the member 6 inwardly of the recess 4. Rotative movement between the lbody portion 1 and the member 6 continues until engagement and facilitate rotation of said stud receiving portion relative to the stud.

Other objects and features of novelty of the invention will be specically pointed out or will become apparent when referring, for a better understanding of the invention, to the following description taken in conjunction with the accompanying drawing, wherein:

Figure l is an elevational View of a chuck according to the present invention, with the lower portion thereof in section to show internal parts in their stud driving position;

Fig. 2 is a View similar to the lower portion of Fig. l, with parts shown in their chuck withdrawing position, and

Fig. 3 is a detail sectional View taken on the line 3 3 of Fig. l.

VThe stud driving chuck of this invention as specifically illustrated in the drawing comprises a body portion 1 having at its upper end suitable attachment means conforming to the machine in which it is to be mounted and here shown as a hexagonal end portion 2 having an interiorly threaded end opening 3.

The lower end of the chuck is provided with a recess 4 extending into the body portion 1 and threaded at 5 to receive a member 6 which is thereby mounted within the recess for movement rotatably and longitudinally of the body portion. The member 6 is provided with an annular enlarged portion 7 received within a corresponding enlargement in the recess 4 and providing an upper shoulder 8 and a lower shoulder 9. A retainer ring 11, mounted in an annular groove in the recess wall, is engaged by the shoulder 9 to limit longitudinal movement of the member 6 outwardly of the recess 4.

The member 6 is provided with an opening 12 through the longitudinal axis thereof, in which is disposed the stem 13 of an anvil member 14 having a head 15 disposed between the interior end of the member 6 and the bottom of the recess 4. The lower portion of the opening 12 is enlarged at 16 and threaded as shown to receive the stud 17, the end of the opening being chamfered at 2.0 to facilitate insertion of the stud within the chuck. The piece in which the stud 17 is to be driven is shown at 18 is effected therebetween at the shoulder S or the head 15 is clamped between the bottom of recess 4 and the end of member 6, or both. Continued rotation ofthe chuck then effects further insertion of the stud 17 within the opening 16 until the end of the stud engages the endfof the stern 13vof the anvil 14.

If, when rotation between the body portion 1 and the member 6 stops, the collar 15 is clamped between'these parts, the stud 17 engagement with the anvil 14 immediately results in locking the parts together for positive drive of the stud 17. If the body portion 1 and the member 6 engage at the shoulder 8 before the anvil" is clamped, engagement of the stud with the anvil will effect movement of the anvil into engagement with the bottom of the recess 4 to lock the parts in positive driving relation. After this positive connection is eifected,r continued rotation of the chuck will insert the stud 17 within the opening 21 in hub 19, the stud 17 cutting its own threads therein as previously described, and assuming the A position shown in Fig. l.

After the stud is driven into the piece in which it is f to be mounted, rotation of the chuck is reversed to elect withdrawal thereof. As previously described, rotation i between the member 6 and the body portion 1 `at-the threads 5 is more easily effected than rotation relative to the stud 17, hence upon initial reverse rotation of the chuck it iirst rotates relative to the member 6 to jeiectl longitudinal movement of the member vrelative to the body portion 1 outwardly of the recess '4 until-shoulder 9 engages ring 11. With this relative movement of the''V` member 6 and the body portion 1, the positive connection between stud 17, member 6, anvil14 and body'portion 1 is broken since a clearance now appears between the j head 15 of the anvil 14 and the bottom of the'recess 4, as

shown in Fig. 2. The anvil 14 being freely vmovable lon-"- gitudinally` of the member 6, the stud 17 and member 6 are now freely relatively rotatable as the chuck continues to rotate in the withdrawing direction. It is clear that since the stud 17 cut its own threads within thepiece 18, a greater resistance will exist to relative movement between stud 17 and piece 18 than exists'betweenthe",l now freely relatively rotatable member 6 and stud 17 so that withdrawal of the chuck with the Vdriven studv re mailling in place is ensured.

having an unthreadedopeniugl n a sind movablev longitudinally of themember 'tive rotation therebetween into positive driving engagetion ofl said member Y openi comprising a body portion,

Vwtnttis dermatitis: ,Y l. A stud driving chuck anaxial extension in said recess withl one end adjacent tof the endof said recess and its axial extension ontfv wardly therefrom, af rotatable member threaded in said recess'v so asl to be longitudinally movable therein upon relative rotation said member having aportion extending outwardly from the'Y proximate end of said body portion and an axial openingtherethrough withvsaid anvil extension extending-through-the interior portion ofv said opening and freely movable longitudinally of the member, the extended portion of said member being internally threaded to receive YaV stud mqvablelongitudinally of tlrermember upon relative rotation therebetween-,into positive driving` engagemnt with the anvil extensionp 2c: A stud a'reces'sfinonev end of saidbody portion, an anvil having an axial extension in said recess with `one end adjacent to the end of said recess and its axial extension out@ wardly therefrom; a rotatable member threaded in said recess so as to be longittuiirmllyl movable .therein upon said member having a portion the; proximate endV of said body portion opening ing-lthronghthe interior portion ofsaid openingmd freely movable longitudinally of themember, the extended portion` of said member beinfrii ternall Ythreaded' toreceive upon relaand an axial Vment withvthe anvil extension, and means for limiting-out-4 ward movement ofV said'` member relative to said bodye kporticnrto a position where it is still threaded in said recess.

3; A stud driving chuckA comprisinga body portion,

a recessin one-end ofsaid body portion, an anvil having an @dal extension in said recess with one end adjacent to the end of said recess and its axial extension out- .ardlythereirom,a rotatable member threaded in said recess so as to be longitudinally movable therein upon between said member and body portion,-

drivingY chuclrcomprising a body portillon,`VV

relai-iverotauon between' said member and'v body portion,- extendingY outwardly fromi therethrough with said anvil extension ex-tend-V Y relative rotation between said member and body portion,

said member having a portion extendiugroutwardly from the'proximate end of said bodyjportion and anaxial opening,therethroughA with said anvil extension Yextend-` ing through the interiorV portion of said opening and freely movable longitudinally of the membvenrthe extended por-Y being-internally threaded to receive a studmovable longitudinally or the member upon preladtive` rotation therebetween into positive'driving'V engagement-'with the anvilfextensiongthe threads between said member andzbod'y portionv being morereadily relatively.Y

rotatable than-the threadsbetvveen saidstnddand'l the interior 0f= said" member so lthat rotation of tilechuck relative toa' stud toV engage'itiis` accompanied byrelative rotation betweenV saidmember and body portion andlongitudinalf'movement ofthemember interiorly of the recess? with subsequentlocxing of said body portion, anvil, member and stud intofpositive drivingrelaton 4L A stud-drivingi'chuclfr comprising a bbdy portion,l a recess inone end of saidbody portion, an anvil having-V ania'xial extensionin said recesswit'n one end adiacent tofthe endl" of said recess`1 and-its axial extension out-- wardly therefrom, aVv rotatable member threadedin said recessfso as to-berlongitudinally movable therein uponVV relative rotation betwcenfsaid member and'body portion,

said member having. a portion-extending' outwardlyl 'from the proximate end;y of saidV body portieri and" an" 'axial therethrough withsaid' anvil' extension extend- Vmentwith the anvil extension, the threads between said member and bodyY portion being more'readily relatively rotatable than the threads between said stud andthe interior of said member so that rotation of the chuck relative to a stud to engage it is accompanied by relative rotation between said memberv and body portion and longitudinal movement of the' member i'nteriorly of the recess with subsequent lockingof said body portion, anvil, member and stud reverse" rotationl ,of said chuckY after` Vtl'fefs'tiid' Y into' place met effecting relative rotation' andiorgitutiinal movement between said member and bodyiportion to release the positive' drivel and'V pro-vide forV free rotative movement between the mem er and stud to facilitate disengagement of the chuck.

5. A stud driving chuck comprising a body portion, a recess in one end of said body portion, an anvil having an axial Yextension in said recess with one end adjacent to the Vend of said recess and its axial extension outwardly therefrom, a rotatable member threaded in saidv recess so as to be longitudinally movable therein upon relative-rotation between said'v member and body portion, said member having aportion extending outwardly from the proximate end of said body portion and an axial opening therethrough with said anvil extensionL extendL ing through the interior portion of said opening'andA freely Y having a" rotative axis/*said body portionv havin'ga recess' inthe end with .its axis alignedV with said rotative axis; a member threaded in said recess andvhaving a V central opening, and a headed pin having its steinl disposed in the central opening in the member and its headmovable between' the'bottom of the recess and the4v interior end of the member, the wall of thev opposite endof the openinginA said member being threaded to receive a'studv which is moved into engagement with the endof'said stem;

7. A stud drivingV chuck cotrlprisingv a body portion having a rotative axis, said body portion having a recess in ther enclwithv itsgaxis aligned'with-said-rotative a'xisga member threaded inM said recess andk havingfa central opening, means limiting the movementof` said member out of lsaid recess to a position where it remains"V threaded therein;v and a: headed` pin having' its stem' ex'- tending'f into the interiorend'of the opening'j in` the '.mem-L ber andits' head( between the bottom of the recessiaildy the interiore'nd'of theY member, the wa1l-in-theextendingendot th'elopeniriginA said membert being threaded-,tore' ceive a stud which is moved into engagementwith the Vend of said stein. I

8. A stud'- driving chuck?.comprising a;4 body portion havingfaz rotative axis,A said bo'dy: portion having: arecess in"l theV endwithr its-j axis alignedwithfsaid rotative axis; a'm'erriber threaded insaid 'recess' and Yhaving-a central 1 opening;- Y means flimitingthe movement: of said member out of saidY recess to a' position where itA remains threaded there'irnvan'd Iathea'ded pin havingitsy stemA disposed in theinterior end vofthejrnember'opening and itsv head/between Athe bottoinfof' the recess? and the interior. end of the member, the'opening at thel extending entlofA said member being internally threaded tolreceivc'a stud which 'is' movedinto engagement with-the e'ndl of=saidstem, the? thireadsbetween'said member and-body portion beingl more readily relatively rotatable thanthe' threadsV betweenV said stud`| and member so that insertion of; a"

stud'- in* the A"member by rotation of the f chuck relativelo the' std" resul irirel'a'tive rotation fbetweehes'aid membery and body por tioi ia'nd consequent movement themernberinteirly'o'thefrecesstto alinited position", further into A.positive driving relation,

rotative movement of the chuck effecting relative rotation of the member and stud to move the stud into engagement with the end of the stem to lock said body portion, pin, member and stud into positive driving relation, initial reverse rotation of the chuck to remove it from the stud effecting reverse relative rotation between the member and body portion and movement of the member outwardly of the recess to the position determined by said limiting position whereupon the member is freely rotatable relative to the stud to eiect disengagement of the chuck therefrom while leaving the stud in its driven position.

References Cited in the le of this patent UNITED STATES PATENTS Funk Mar. 2S, Sehrt Dec. 12, Caminez Sept. 20, Hass et al. Nov. 9, Schnabolk June 13, Randolph Nov. 22, Vanden Bos et al Dec. 23, Ratterath July 30,

FOREIGN PATENTS Great Britain Nov. 11, Great Britain Apr. 17, 

